Shoe bottom roughing machines



Dec. 29, 1964 T. A. KESTELL SHOE BOTTOM ROUGHING MACHINES l0Sheets-Sheet 1 Filed June 20. 1962 Dec. 29, 1964 T. A. KESTELL SHOEBOTTOM ROUGHING MACHINES l0 Sheets-Sheet 2 Filed June 20, 1962 wsw Dec-29, 1964 T. A. KESTELL 3,163,031

SHOE BOTTOM ROUGHING MACHINES Filed June 20, 1962 10 Sheets-Sheet 3 Dec.29, 1964 T. A. KESTELL 3,163,031

SHOE BOTTOM ROUGHING MACHINES Filed June 20. 1962 10 Sheets-Sheet 4 Dec.29, 1964 T. A. KESTELL 3,163,031

SHOE BOTTOM ROUGHING MACHINES Filed June 20, 1962 10 Sheets-Sheet 5 336242 f 330 256 20 Ell/9: 5 5245 Z42 Dec. 29, 1964 T. A. KESTELL SHOEBOTTOM ROUGHING MACHINES l0 Sheets-Sheet 6 Filed June 20, 1962 www T. A.KESTELL SHOE BOTTOM ROUGHING MACHINES Dec. 29, 1964 10 Sheets-Sheet 7Filed June 20, 1962 Dec. 29, 1964 T. A. KESTELL 3,163,031

sacs: BOTTOM ROUGHING MACHINES Filed June 1962 10 Sheets-Sheet .8

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SHOE BOTTOM ROUGHING MACHINES Filed June 20. 1962 10 Sheets-Sheet 9 1964'1'. A. KESTELL' 3,163,031

SHOE BOTTOM ROUGHING MACHINES Filed June 20, 1962 10 Sheets-Sheet 10United States Patent Ofitice 3,lb3,ii3i Patented Dec. 29, 1964 3,163,031SHOE BOTTQM RUUGHENG MACHINES Thomas Aubrey Kestell, Leicester,Engianti, assignor to United Shoe Machinery Corporation, Flemington,N.J., a corporation of New Jersey Filed June 26, 1962, Ser. No. 203,994Claims priority, appiieation Great Britain June 28, 1961 28 Claims. (Cl.69-65) v This invention relates to shoe machinery and more particularlyto machines for roughing the bottoms of partially fabricated shoes priorto the attachment of outsoles.

In the preparation of a shoe bottom for cement sole attaching, it hasbeen the usual practice for an operator to present a shoe manually to aroughing machine which generally includes a power driven circular wirebrush. The shoe, on a last, includes an upper, the marginal portion ofwhich has been lasted inwardly over the insole around the perimeter ofthe shoe bottom. The overlasted surface of the upper is that which mustbe roughed, the operator taking care not to extend the roughingoperation beyond the feather line of the shoe. The success of theoperation, therefore, depends entirely upon the skill of the operatorand not only must care be taken that the roughing does not extend ontoportions of the upper that will be visible after the outsole has beenattached but also the lasted margin of the upper must be abradedsufficiently to offer a good attaching surface for the outsole cement.

It is the principal object of this invention to provide a machine forroughing the sole attaching surfaces of partially fabricated shoes whichoperates automatically and requires little or no skill on the part of anoperator.

Another object of this invention is to provide a shoe bottom roughingmachine having a roughing tool which automatically follows the variablecontour of the shoe n bottom during the roughing operation.

It is another object of this invention to provide an automatic shoebottom roughing machine in which the angular relationship between theroughing instrumentality and the shoe remains substantially constantthroughout the operation.

It is still another object of this invention to provide an automaticshoe bottom roughing machine having means for assuring that the roughingoperation will not extend onto areas of the shoe which will be visibleafter an outsole has been attached.

Yet another object of this invention is to provide a shoe bottomroughing machine with roughing instrumentalities which will operate atvarying degrees of pressure on the shoe bottom.

Still another object of this invention is to provide a shoe bottomroughing machine having roughing instrumentalities which may be adjustedto vary the amount of roughing imparted to the shoe and the amount ofpressure with which the roughing operation takes place.

In accordance with these objects and as a feature of this inventionthere is provided an automatic shoe bottom roughing machine, anillustrative example of which will hereinafter be described in detail,which includes means for supporting a partially fabricated shoe on alast with its bottom facing upwardly, a power driven rotary tool andmeans for moving the tool automatically about the shoe bottom in acontinuous peripheral movement whereby the tool operates on the lastedmargin of the upper moving in a path conforming to the outline of theshoe. The tool moving means are adjustable to vary the initial positionof the tool in accordance with the size of the particular shoe beingoperated on. The amount of movement of the tool along the heel-toe axisof the shoe bottom, as Well as transversely thereof, is variable inaccordance with the size of the shoe.

As another feature of the invention, the support means provided topresent the shoe bottom upward to the tool is pivotal in a predeterminedmanner about an axis extending substantially parallel with the heel-toeaxis of the shoe so that the angle between the tool and shoe bottomremains uniform with respect to the variable contour of the shoe bottomacross its width. The machine is also provided with means to pivot thetool simultaneously in a predetermined manner transversely of theheel-toe axis so that the angle between the tool and the shoe remainsuniform with respect to the variable contour of the shoe bottom in theheel-toe direction. The combined result of pivoting the shoe and thetool is to insure that the tool not only engages the shoe at a uniformangle about its entire perimeter but also to insure that the individualroughing elements of the tool move from the outer edge or feather lineof the shoe bottom across the lasted margin toward the inside of theshoe and thereby produces a wiping action to the margin of the lastedupper.

As another feature, the various motions imparted to the tool in itstravel about the shoe and the rocking motions imparted to the tool andthe shoe support originate from the same power input shaft. Means areprovided for varying the speed of the input shaft in accordance with thelocation of the tool with respect to the shoe perimeter whereby the tooloperates progressively about the margin of the bottom at a variablespeed.

Still other features are embodied in the work support which is operatedby yieldable means to elevate the shoe toward the tool and to maintainthe shoe yieldingly in engagement with the tool during the operation onits bottom. This invention also contemplates the use of control meanswhich cooperate with the yieldable shoe support elevating means forvarying the height of the Work support automatically in accordance withheightwise variations in the shoe bottom. The work support includesadjustable mechanism for supporting the shoe bottom upward and whichwill accommodate shoes of various sizes and shapes. Work masking meansare provided to engage the shoe at the feather line in the areaintermediate the toe and heel to define more clearly this area andprevent the roughing tool from extending the roughing operation beyondthe bottom and onto portions of the upper which would be visible afterthe sole has been attached.

As another feature of this invention, there are disclosed alternativeforms of roughing tools which comprise, generally, power drivenrotatable housings from the bottom of which flexible work engagingmembers extend. The work engaging members are wire brushes, and inaccordance with one feature of the invention means are provided forvarying their angle of inclination relatively to the direction ofrotation of the housing thereby to vary the degree of roughing action onthe shoe bottom.

In accordance with another feature of the invention, the rotary housing,and hence the roughing members, are slidingly mounted relative to theiraxis of rotation and fluid means are provided to raise the housingduring the roughing operating to reduce the effective pressure of theroughing members against the shoe bottom.

The above and other features of the invention including various noveldetails of construction and combinations of parts will now be moreparticularly described with reference to the accompanying drawings andpointed out in the claims. It will be understood that the particularmachine and alternative constructions embodying the invention are shownby way of illustration only and not as limitations of the invention. Theprinciples and features of this invention may be employed in varied andnumerous embodiments without departing from the scope of the invention.In the drawings,

FIG. 1 is a plan view, with parts broken away, of an automatic bottomroughing machine embodying the invention; I

FIG. 2 is a side elevation of the portion of the machine shown in FIG.1;

FIG. 3 is an end view in elevation of portions of the maphine shown inFIG. 1 with a shoe in position to be roughed;

FIG. 4 is a detail view on a somewhat enlarged scale of a roughing tooland part of its mounting mechanism;

"FIG. 5 is a sectional view in elevation of one form of roughing toolused in the machine;

FIG. 6 is a bottom plan view of the tool shown in FIG. 5;

FIGS. 7 and 8 are detail views of mechanism in the tool shown in FIG.Sffor adjusting the angle of the Wo k e n ugh ng memb FIG, 9 is a sideelevation, similar to FIG 2, showing an alternative form of constructionof the machine;

FIG. 10 is a perspective view of one form of work sup port used in themachine;

' FIG. 11 is a sectional view in elevation of another form ofroughingtool;

FIGS. 12 and 13 are detailed views of control mechanism for the shoesupport used in the machine; and,

FIG. 14. is an end view in elevation of the variable speed power inputmechanism of the machine.

Pivotal T 001 Support Referring first to FIGS. 1 to l, the illustrativemachine is provided with a rotary ronghing tool suspended from andoperated by an electric motor 21. The details of construction of twotypes of roughing tools will be hereinafter described in more detail.The motor 21 is c ahly ecure by a pair of bolts 2 (F G- 4) and a ppor nb acket, n t sho n t a p an e tends t 't e he eof s een n F G. h P st 22i ure to a haf 24 ar ed n br ets 2r projec in up ardly rQm upp r g p a2. The ha t 24 end ene ll h r z nta y l th se of h ma hi as viewed inFIGS. 1 and Z,

A bell crank lever 36 is fixed to the shaft 24 and has a Bowden cable 32secured to one of its arms 33. The cable extends through an axiallybored adjustable stop member 34 (FIG. 4) pivotally mounted on a post 36projecting upwardly from the plate 28. A spring 38 is tensioned betweenthe arm 33 of the bell crank lever 38 and the plate 2:8. Attached toopposite sides of the other arm 46 of the bell crank lever are twotension springs 42 which are also secured at their opposite ends to aportion of the machine frame (not shown).

The Bowden cable 32 extends around the machine and is joined at itsopposite end (FIG. 2') to an arm 44 of a e l r nk eve p oted on a sha t4 ar d in lugs 48 depending from a base plate 5%} on the righthand endof the machine frame as viewed in PEG. 2;, The other arm 52 of the bellcrank lever carries a follower roll 54 which engages the upper face 56of a cam 58 fixed to a vertically oriented main shaft 60. The Camfollower 54 is urged into engagement with the cam surface 56 by thetension springs 38, acting on the bell crank lever 36 and transmittedthrough the Bowden cable 32. As the cam 58 rotates, the bell crank lever45, also through the Bowden cable 32, imparts a rocking movement to thetool 26 about the shaft 24 in a predetermined manner, i.e. in accordancewith the profile of the face 56 of the cam 58.

Work Support The machine is provided with means, one form of which isseen in FIG. 3, for supporting, in inverted position, a last carrying apartially fabricated shoe comprising an upper U, the marginal portion Mof which has been lasted inwardly over an insole I. The supporting meanscomprises a toe rest 62 projecting from a block 62a and engageable withthe shoe in the toe region and a heel rest or support generallydesignated 64. The hee rest 64 comprises a block 63 which pivotallymounts a double arm lever 65. On the upper arm 65a of the lever 65 is alast pin 65b which is received within the last socket. A screw 67 isthreaded in the depending arm 65c of the lever 65 and abuts the block63. When the last has been placed on the pin 65b, advancing the screw 67against the block 63 causes the lever 65 to pivot in a counterclockwisedirection, a viewed in FIG. 3, to press the toe of the shoe against thetoe rest 62. The toe rest 62 and the heel support 64 are both securedwith a tight sliding fit to a bar 66 which forms part of the frame workthrough which rocking movement is imparted to the shoe by means now tobe described with reference to FIGS. 2 and 3.

The axis of the bar 66 will be seen to extend substantially parallelwith the heel-toe axis of the shoe. Bosses 68 depend from the bar 6.6and mount pins 76 on which are pivoted the ends of parallel links 72,The opposite ends of the links 72 are pivotally connected by pins 74(FIG. 2) to the ends of hell crank levers 7 6 which are secured to theends of a shaft 78 extending horizontally through the machine. The lowerend of the right-hand bell crank lever 76 (as seen in FIG. 3) ispivotally secured by a pin 8% to a rod 82 extending generally lengthwiseof the machine. Adjusting means 84 are located intermediate the ends ofthe rod 82 for varying its length. The rod 82 is adjustably andpivotally secured by a bolt 86 in a slot 38 formed in the depending arm9 of a bell crank lever 92. The lever d2 is fulcrumed on a shaft 94supported by lugs 96 (FIG. 1) projecting from a plate 98 on which themain vertical drive shaft 60 is also sup ported. The other arm 191 ofthe bell crank lever 92 mounts a cam follower 102 which is engageablewith the lower face 57 of the aforementioned cam 58. A spring 166 istensioned between the lower end of the arm 99 of the lever 92 and aportion of the machine frame (not shown) to urge the follower 102 intoengagement with the profile 57 of the cam 58.

Again referring to FIG. 3 and the left-hand portion of FIG. 2, the bar66 will be seen to be supported at opposite ends by arms 108 pivotallyconnected by pins 109 to the upper ends of vertical supporting arms11%.. Links 112 are pivoted at the lower ends of the arms 11%. The links112 are also pivoted at their opposite ends by pins 114 secured toplates 116 secured to an intermediate brace 117 in the machine frame.Intermediate their ends, the arms are provided with support arms orlinks 118 pivotally attached thereto by bolts 12% and at their oppositeends to the plates 116 by pins 121, the arms 118 and the links 112thereby providing a pivotal trapezoidal support for the substantiallyvertical arms 110.

To elevate the shoe into operative engagement with the tool andthereafter to assist in providing a substantially uniform pressurebetween the shoe bottom and the tool 21 as well as to assist in havingthe tool follow the variable contour of the shoe bottom, a pair ofcompressed air cylinders 124 are provided to urge the arms 110yieldingly upwardly. The lower ends of the cylindcrs 124 are pivotallyconnected to a lower portion of the machine frame (not shown).Connecting rods 126 extend from pistons within the cylinders 124 and arepivotally connected at 127 to the links 112. Thus, the shoes are heldupwardly against the work tool 29 by the force of the air within thecylinders 124. Operator controlled treadle mechanism hereinafter to bedescribed is employed to control the action of the air cylinder on thework support. It will be obvious to one skilled in the art that suitablydesigned spring mechanism may be used as an equivalent or" the aircylinders 124.

Movable Tool Carriage Included as a portion of the main frame of themachine is a substantially hollow, elongated cast iron frame member 128(FIG. 2). The plate 98 which, among other things, is a thrust plate,mounts the vertical shaft as and is secured to the frame member 128 nearits right-hand end. The central and left-hand portions of the framemember 128 form a guideway, generally indicated 130, for a movable toolcarriage 132. The carriage comprises a centerpiece 134 (FIG. 2) withfour lugs 133 each mountingon a vertical axis a roller 136 (FIG. 1)engageable with the opposite sides of a central rail 13% on the guideway130. Also on the centerpiece 134 are four depending lugs 140 eachproviding a horizontal bearing support for a large roller 142 and asmaller roller 143. The rollers 142 ride on the upper, and the rollers143 on the lower surfaces of the guideway 131), respectively. Thus,there are twelve rollers, four of which support the tool carriage 132 onthe guideway 130 for horizontal movement lengthwise of the machine orfrom left to right, as seen in FIGS. 1 and 2.

For moving the carriage 132 along the guideway 139 a bracket 144 issecured to one of the lugs 140 on the centerpiece 134, to which bracketa rod 146 is pivotally attached. The rod 146 extends substantiallyhorizontally toward the right-hand end of the machine and carries at itsright-hand end a bolt 148 adjustably and pivotally received within aslot 150 in a lever arm 152. Adjusting means 154 are locatedintermediate the ends of the rod 146 for varying its length. Theopposite end of the lever arm 152 is fixed to a vertical shaft 156extending through the plate 50 (FIG. 2). Also fixed to the shaft 156 isan arm 158, which, at its free end, mounts a cam follower 160. The lever152 and 158 are, in effect, arms of a bell crank lever, The follower16f) engages the peripheral face of a cam 162 mounted on the main shaft60. The follower 161) is held in engagement with the face of the cam 162by a spring 164 tensioned between the arm 152 and a projection 165 on adepending portion of the plate 59.

The top of the centerpiece 134 on the carriage 132 constitutes a secondguideway 163 (FIG. 2) which extends transversely of the machine. Theguideway 168 supports a second or upper movable carriage 170. Thecarriage 170 will be seen to include the aforementioned plate 28 whichmounts the pivotal support mechanism for the roughing tool 20. Thecarriage 170 also includes an undercarriage 172 having rollers 171 whichroll on the sides of the guideway 168 and rollers 173 which roll on thetop and bottom edges of the guideway 168. The carriage 170 is movedtransversely of the main carriage 132 and, consequently, transversely ofthe machine by means including an upstanding bracket 174 which issecured to the plate 23. A link 176 is pivoted to the bracket 174 by apin 178. The opposite end of the link 176 is pivotally connected at 177to one end of a composite crank 180. The other end of the crank 184 ispivotally connected to a supporting arm 182 pivoted on a vertical shaft184 supported on the base plate 59. The composite crank 180 isadjustably clamped to the cam 162 by a T-bolt 186 fitting within a slot188 in the cam 162. Rotation of the cam imparts a predetermined lateraltranslation of the upper carriage 170 relatively to the main carriage132 through the crank 18d and the link 176.

Drive Mechanism A horizonally oriented power input shaft 190 (FIGS. 1and 2) is supported by bearings 192,124 on the machine frame. Betweenthe bearings, which act as stops, is positioned a couple 196 forpreventing undesirable lengthwise movement of the shaft 190. Secured tothe left-hand end of the shaft 190 is a worm 198 meshing. with a wormgear 200 fixed to the main shaft 66 6 for imparting driving movement tothe operating cams of the machine.

A cam 202 attached to the cam 162 on the main shaft 69 is engaged by acam follower 204, best seen in FIG. 1. The follower is pivotally mountedon the end of an arm 2% which is fulcrumed on the above-mentioned shaft156. The opposite end of the arm 206 is secured to a B owden cable (notshown) which is connected to a variable speed cone pulley, hereinafterto be described, to vary the speed to the input shaft 190 and, hence,the drive shaft es.

Work Masking Means It has been found that, whereas in the toe, forepartand heel regions of the shoe bottom, a clean roughing operation isreadily obtainable because of the sharpness of the feather line, in theshank or midportion of the shoe it is more difficult to obtain a cleanroughing operation because the feather line is not as distinctlydefined. In order to effect a clean roughing operation on the shank ormidportion of the shoe bottom, the machine is provided with maskingmeans. One form of masking means is shown in FIGS. 2 and 3 and comprisesa mask 20% adjustably secured in clamps 211 which are mounted on abracket 212 supported by a post 214. The post 214 is adjustably mountedon a rod 216 which is also adjustable, being secured to the bar 66 by asliding block 218. The mask 2% is replaceable with different maskscorresponding to different styles and sizes of shoes. The mask engagesthe feather line of the shoe in the shank portion, as shown in FIGS. 2and 3.

Alternative Work Support and Shoe Masking Means An alternative worksupport and shoe masking means are shown in FIG. 10. The alternate worksupport is generally similar to that shown in FIG. 3 and comprises a toerest, generally designated 25h, masking means, generally designated 252,and a heel support, generally designated 254. The toe support 254comprises a block 25s slidably mounted or. the bar 66 and on which ismounted a toe pad 258. Extending laterally through the toe pad 258 is arod 269 to which is adjustably secured toe clamping means comprising twoclamps 262 which are engageable with the toe of the shoe, one on eitherside thereof in the region adjacent the feather line. The masking means252 is also slidably secured to the bar 66 by a block 264 spaced fromthe block 256 of the toe support 250. Extending laterally of the block254 is a rod 265 on either end of which is adjustably mounted a support268 for a clamp 27%. Each clamp is provided with screws 272 for holdinga masking plate 274 in position. Thus, there is provided a pair ofmasking plates, arranged, one on either side of the shoe in the shankregion. The plates 274 not only provide means for sharply defining thelimit of the area to be roughed in the area of the shoe shank bottom asthe tool operates progressively thereon, but also provide means forgripping the shoe intermediate its ends. It will be understood thatditferent sets of masking plates are provided for different size andstyles of shoes to be roughed.

The heel support 254 comprises a block 276 mounted for sliding movementon the bar 66. Attached to the block 276 is a substantially U-shapedmember 278 supported by stays 230. The member 278 is generally of theconfiguration of the heel end of a shoe'and is engageable therewith. Theblock 276 is also provided with clamping means comprising a recess 232in its upper surface and a pivot pin 284 on which is mounted a pressuremember 286 which fits within the recess 282. At the toeward end of themember 236 is a plate-288 engageable with the crown face of the heelportion of the last. At its heelward end the member 286 includes a bore291) through which passes a bolt 292. The lower or unseen end of thebolt is threaded into a bore in the horizontal face of the recess 282.As the screw 292 is 7 rotated downwardly into the block 27%, itsenlarged head causes the pressure member 286 to pivot about the pin 2&4raising the plate 288 against the crown of the last, forcing the shoeupwardly into engagement with the masking plates 274 as it is presseddownwardly on the toe pad 258.

Alternative Work Support Elevating Means Alternative means whichcooperate with the air cylinders 124 for moving the work support towardand away from the tool and for assisting the tool in following thegeneral contour of the shoe bottom will now be described with referenceto FIG. 9. The bar 66 has been described with reference to FIG. 2 assupported by the two upright arms 10% which are, in turn, pivotallyconnected at their upper ends to the raising'arms 116. In the FIG. 9 oralternative construction, the links 112 are, as in the FIG. 2construction, pivotally connected at their left-hand ends to the lowerends of the arms lit) but at their opposite ends are keyed to theabove-described shaft 114. which is supported in the bracket plates 116.

Also keyed to the shaft 114 in the alternative construction is an arm294 provided at its lower end with a threaded boss 295 which receives ascrew 2%. The screw 2% abuts an arm 29.8 which is freely mounted on theshaft 114. The lower end of the arm 2% is pivotally connected at 299 toa rod 3% the opposite endof wh ch is pivotally connected to. the lowerarm 3% of a bell crank lever 3552 pivoted on a lower portion of themachine frame. The free end 3% of the bell crank 3il2 mounts a camfollower 304 engageable with the face of a cam 3% fixed to the lower endof the main shaft 6:23 which in. thi construction is longer than in theFIG. 2 construction and extends through the.frame member 128.

As in the FIGv 2 construction, the links 112 are urged upwardly by thepiston rods 1% extending from the air cylinder-$124. In the PEG. 9modification of the machine, the air cylinders 124 cooperate with thecam 306 to control the height-wise movement of the shoe supporting meansas the tool 2Q follows the general contour of its bottom. As the mainshaft 69 rotates, the cam follower 3% is held in engagement with the cam306. by the pressure of the compressed air cylinders 124, on the links112 acting through the arms 2% and 298. The arm 2%, as well as, the arm298 are urged in a clockwise direction about the axis of the shaft 114and, in turn, the bell crank lever 3%2 is urged clockwise with itsfollower 3% held in engagement with the lower profile of the cam 3%.Whereas, the cylinders 12 6 tend to urge the shoe support upwardly, theworking pro-file of the cam 366; will accordingly lower the work supportin a predetermined manner through the action of the arm 2% on the screw2% in the arm 294,

Roughing Tool Referring to FIGS. 5 to 8, one illustrative form ofroughing tool, generally designated 20, will now be described. The toolcomprises an outer casing or housing 222 enclosing a pair of cup-like,concentric, flanged members also referred to as plates 224i, 228. Aspindle 238 extends upwardly along the central axis of the casing 222and is driven by the electric motor 21 (FIG. 3). The actual workingmembers comprise a plurality of flexible Wire roughing brushes 232inserted in the tool, each brush comprising bristles secured in clamps234. Secured to each clamp is a screw 236 by which the roughing brushesare held in the casing 222. The brushes 232 normally lie substantiallyparallel to the axis of the spindle 230. As seen in FIG. 6, the brushes232 are positioned equidistant from each other and. from the axis of thespindle 235 near the periphery of the casing. To accommodate thebrushes, the plates 226 and 228 areprovided with a plurality of slots237, 238, respectively (see particularly FIGS. '7 and 8), arrangedradially of the housing. When the slots 237 in the platev 226 are invertical alignment with the slots 298 in the plate 228, the brushesassume the position 8 shown in FIG. 7, i.e., parallel With the axis ofthe spindle 2 3%. However, the angle of inclination of the bristles maybe varied (FIG. 8) with respect to the direction of rotation by rotatingthe plates 226, 228 relatively to each other.

Relative movement between the members or plates 226 and 228 is obtainedby the movement of eccentrics 24% and 249a fixed to pins 242 and 242a,respectively. The pins 242 and 242a are provided with hex heads 242i)and 242s, respectively, to facilitate their being turned by a wrenchengageable therewith through the open upper central part 223 of thecasing 222. The eccentric 240a is accommodated in a slot 241 in, andthus acts upon, the plate 226 while the eccentric 249 acts upon theplate 2-28, being engageable with a slot 243 therein. An aperture 245 isprovided in the plate 226 to permit passage of the pin 242a withoutinterference with the plate. By rotating the pins 242 and 242a, theflexible bristles 232 may be made to lead or trail the direction ofrotation of the tool or to stand substantially vertically, dependingupon the type of material used and. the degree of roughing required.

Alternative F 01 171 of Roughing Tool Referring to PEG. ll, analternative form of roughing tool will now be described. The tool isprovided with an electric motor 21 which is operatively connected to aspindle 31d of the tool. The spindle is provided near its lower end withan integral collar 312 and below the collar the spindle is tapped toreceive a nut 314. A circular plate 3E6 is clamped between the nut 314and the collar 3.22 The spindle 310 is mounted for rotation in a bore317 in a sleeve bearing 31% or sleeve as it is also called. An annularspace 319 exists between the spindle and the sleeve for most of itslength. The sleeve bearing 318 is secured to a bracket 320 attached tothe aforementioned tool supporting. post 22. The sleeve bearing 33? isheld to the bracket 320 between a nut 322 and a collar 324-. on thesleeve. A passageway 326 i formed in the collar 324 and communicateswith the annular space 319 between the spindle 310 and the sleeve 318.An air hose 327 is connected by a fitting 323 to the passageway 326 andat its opposite end to a source of compressed air (not shown).

The roughing tool also comprises an outer casing or housing 330 providedwith an open circular bottom chamher it; which the plate 316 slides.Bores 332 are spaced equidistant from each other about the periphery ofthe housing 330 which is substantially frusto-conical and the bores 332are formed therein also in a substantially frustoconical configuration.Fitted in each of the bores is a work engaging roughing membercomprising annular wire brushes 334, each brush being clamped inposition by a set screw 336 whereby the brushes are readily adjustedheightwise and are replaceable. Integral with the outer casing 33% is aninternal flanged collar 338 which is clamped on a sleeve 340 between anabutment collar 342 and a nut 344. The sleeve 349 is mounted for axialsliding movement on and rotation about the sleeve bearing 31% and restsat its lower end on the collar 312 of the spindle 310. The sleeve 34% isprovided with a flange 3.4.6 at its lower end which is bored to receivea vertically extending pin 34S fixed to the plate 316 to preventrelative rotation of the spindle Sill and the housing 338 but to permitrelative axial movement therebetween. When the spindle 310 is rotated bythe motor 21, the outer casing 338 and thus the brushes 334 rotate withit.

Air under pressure is applied through the hose 327, the fitting 328, thepassageway 326, and the annular space 319 to an interior portion orchamber 329 in the housing 334 The chamber 329 is closed by the plate316 slidably fitting Within the opening 331 in the housing. Less thanhermetic sealing occurring between the flange 346 and collar 312 permitsthe initial passage of a small amount of pressurized air to the chamber329. Pressurized air therefore acts against the lower surface 339 of theflanged collar 338 creating a force to lift the housing 339 lifting theflange 346 from the collar 312 and admitting more pressurized air to thechamber 329. Thus the brushes 334 are raised relatively to the spindle310 which does not move heightwise, being attached to the motor 21.

With the above-described mechanism the effective weight of the tool,that is, the difference between the real weight acting downwardly andthe force of the air acting upwardly, can be varied by changing thepressure of the air. For example, when roughing the bottoms of mensheavy shoes, the whole weight of the tool is used and no lifting air issupplied, whereas, acting upon ladies and juvenile shoes, air pressureis applied accordingly to provide the desired light pressure andfloating action between the tool and the shoe bottom being operatedupon.

Variable Speed Power Input Referring to FIG. 14, the variable speedpower input to the machine will now be described. A motor 349 isconnected by a belt 356 to the input side of a variable speed conepulley 352 of known type and briefly referred to above. Output powerfrom the cone pulley is transmitted to the above-described power inputshaft 190 by a power train comprising a belt 354, concentric pulleys 356and 358, a belt 360 and a pulley 362 fixed to the input shaft 196.Tension is applied to the bolt 354 by a weighted idler 364. The variablespeed cone pulley-is provided with conventional lever operated controlmechanism, generally designated 366. A Bowden cable 368 (shown in endview only) is attached to the lower end of an operating arm 370 of thecontrol mechanism 366. The arm 370 is attached to a shaft 372 and pivotstoward the viewer as seen in FIG. 14. The opposite end of the Bowdencable 368 is attached to the free end of the previously described camoperated lever 2G6 (FIGS. 1 and 2) which is fulcrumed on the verticalshaft 156. As pivotal movement is imparted to the arm 266 by engagementof its follower 234 with the earn 202, the Bowden cable causes the lever376 of the variable speed pulley to move resulting in variable speedoutput from the pulley 352. Consequently, the speed of rotation of theshaft 190 and hence of the drive shaft 66 is varied in a predeterminedmanner in accordance with the profile of the cam 2622.

Operation The illustrative machine is operated in the following manner.The operator first makes machine adjustments in accordance with the sizeand style of shoe to be trimmed. The amount of movement of the tool 20along the heeltoe axis of the shoe bottom is adjusted by varying theposition of the T-bolt 186 (FIG. 1) within the slot 138 in the cam 162.The amount of movement of the tool widthwise of the shoe bottom isadjusted by varying the position of the pin 143 in the slot 150 in thelever 152 (FIG. 1). It is sometimes further required, depending on thesize and style of the shoe, to adjust the amount of rocking movementimparted to the work support. This is accomplished by varying thelocation of the pin 86 (FIG. 2) in the slot 83 in the bell crank lever32. The adjusting means 154 in the rod 146 controls the startingposition of the carriage 132 and hence of the tool 20 relatively to theshoe.

The operator then loads into the machine an inverted last mounting apartially fabricated shoe which as described above includes an upper U,the marginal portion M of which (FIG. 3) has been lastedinwardly over aninsole I attached to the bottom of the last. In the FIG. 3 modificationof the work support, the toe of the shoe is first placed on the toe pador rest 62 with the last pin 65b inserted in the last socket with thecrown of the last on the member 65. The screw 67 is advanced against theblock 63 to cause counterclockwise movement of the member 65 on whichthe last pin is mounted. The last is thus urged downwardly against thetoe pad 62. The

versely of the heel-toe axis.

10 mask 208 is then moved into position at the shank portion of theshoe. To operate on additional shoes of the same size would not requirereadjustment of the mask.

If the alternative work support shown inFIG. 10 is used, the invertedlast is mounted thereon with the toe of the shoe resting on the toe pad258 and the clamps 262 in engagement with the shoe at the toe region.Holding the shoe so that the shank region thereof engages the maskingplates 274- the operator then slides. the heel support 254 along the bar66 toward the heel of the shoe until the heel end is engaged by theU-shaped member 278. In this position the crown face of the heel portionof the last is in engagement with the raised plate 288 of the pivotmember 286. The bolt 292 is then screwed downwardly to urge the shankportion of the last upwardly against the masking plates.

As stated above, the work support is raised yieldingly into operativeposition by the air cylinders 124. When the machine is inoperative, thework support is held downwardly against the force of the air cylinders124 by treadle operatedmechanism shown in FIG. 12. A treadle 386 ispivotally mounted on a pin 382 fixed to a portion 384 of the bottom ofthe machine frame. A cable 386 passing around pulleys 338 and 3% isattached to one of the links 112 against which the piston rod 126 of theair cylinder 124 acts in an upward direction. The treadle 386 ismaintained in its depressed position, as shown in FIG. 14, by a latch392 (FIG. 13) which is urged into locking position by a tension spring394. In its depressed position the treadle 389, through the action ofthe cable 386, holds the link 112 and, hence the vertical support arms110, and, consequently, the shoe in their lower or inoperativepositions. The air cylinders 124 are allowed to move the work supportinto operative position by the operator squeezing a pair of handcalipers 396 on the vertical arm which, through a sheathed Bowden cable398, withdraws the latch 392 from the treadle 330 whereupon the aircylinders 124 raises both the shoe support mechanism and the treadle.

Thereafter, the operation of the roughing tool 2% and the movement ofthe shoe is under the complete control of the machine, the variousmotions being imparted in a predetermined manner by the control cams.The action of the cam 162 through the composite lever 180 and the link1'76 imparts motion to the upper carriage and, hence to the tool,substantially lengthwise of the shoe, i.e., along a heel-toe axis.Simultaneously, the cam 162 through the lever 152 and the rod 14-6 movesthe main carriage 132 and, hence the roughing tool 2%, lengthwise of themachine and thus widthwise or trans- These cam actuated means cooperateto produce continuous peripheral movement of the tool on the margin ofthe shoe bottom in a path conforming to the general outline of the shoe.

The roughing tool 29 (either inthe form shown in FIGS. 5 and 6 or thetype shown in FIG. 11) is pivoted on the carriage, being rocked aboutthe axis of the shaft 24 (FIGS. 1 and 2) which as described above,extends in a direction generally lengthwise of the machine ortransversely of the heel-toe axis of the shoe. This motion ispredetermined and controlled by the upper profile 56 of the cam 58acting through the bell crank lever 45 and the Bowden cable 32. Thismotion causes the roughing tool to follow the variable bottom of theshoe in the heel-toe direction.

The work support, and thus the shoe, is rocked about the axis of thepins 109 (FIGS. 1 and 3), which extend substantially parallel with theheel-toe axis of the shoe. This movement is controlled by the lowerprofile 57 of the cam 58 through the bell crank lever 90, the rod 812,the levers 76 and the links 72. Consequently, the tool follows thevariable bottom contour widthwise of the shoe or transversely of theheel-toe axis.

The result of combining the two above-mentioned rocking motions alsoinsures that the roughing tool 20 en- :gages the marginal portion M ofthe shoe bottom at one llocality only, i.e., at one side of the tool,and secondly, the individual elements (brushes) of the roughing tool'20, as it rotates in a predetermined direction, move from the outeredge or feather lines inwardly across the marginal portion M of the shoebottom whereupon a roughing stroke always is from the outside of theshoe in a direction inwardly across the insole. In this manner the toolproduces a progressive wiping action to the marginal portion M of thelasted upper U and at the same time avoids the possibility of liftingthe lasted margin M away from the insole to which it has been attached.

The variable speed cone pulley 352 which is controlled by the shape ofthe cam 202 and its associated mechanism, i.e. the Bowden cable 363,etc., varies the speed with which the tool 261 operates along the toeand heel ends of the shoe bottom and correlates this speed to the speedat which it operates on the side portions thereof.

Substantially uniform pressure in holding the shoe upwardly in operativeposition is maintained by the two cylinders 124 urging the work supportupwardly. In the alternative construction, shown in FIG. 9, the cam 306and its associated bell crank lever 302, rod 300 and arms 2% and 298also serve to maintain substantial uniformity of upward pressure sincethey control the heightwise movement of the work support during theroughing operation. This is especially advantageous when womens shoeswith a sole bottom contoured to accept relatively high heels is beingroughed since substantial heightwise variations are encountered. Use ofthe pneumatically controlled tool of FIG. 11 also cooperates to controlthis pressure.

Having thus described my invention, what I claim as new and desire tosecure by Letters Patent of the United States is:

1 A machine for operating on the margin of a shoe bottom comprisingmeans for supporting a shoe on a last with its bottom facing upwardly, apower driven rotary tool, a carriage supporting the tool for operativeengagement with the shoe bottom, first means for moving the carriagesubstantially lengthwise of the heel-toe axis of the shoe, second meansfor moving the carriage transversely of the heel-toe axis of the shoe,said first ,and second moving means cooperating to produce continuousperipheral movement of the tool on the margin of the shoe bottom in apath conforming to the outline of theshoe.

2. A machine for operating on the margin of a shoe bottom comprisingmeans for supporting a shoe on a last with its bottom facing upwardly, apower driven rotary tool, a carriage supporting the tool for Ope ativeengagement with the shoe bottom, first cam operated means for moving thecarriage substantially lengthwise of the heel-toe axis of the shoe,second cam operated means for moving the carriage. transversely of theheeltoe axis of the shoe, said first and second cam operated meanscooperating to produce movement of the carriage whereby the tooloperates in a continuous peripheral motion on the margin of the shoebottom in a path conforming to the outline of the shoe.

3. A machine for operating on the margin of a shoe bottom comprisingmeans for supporting a shoe on a last with its bottom facing upwardly,a. power driven rotary tool, a carriage supporting the tool foroperative engagement with the shoe bottom, first means for moving thecarriage substantially lengthwise of the heel-toe axis. of the shoe,second means for moving the carriage transversely of the heel-toe axisof the shoe, said first and second moving means, cooperating to producecontinuous peripheral movement of the tool on the margin of the shoebottom in a path conforming to the outline of the shoe, and meanscomprising partof the said second moving means for adjusting the initialposition of the carriage and hence the tool supported thereon inaccordance with the size of the shoe being operated on. I

4. A machine for operating on the margin of a shoe bottom comprisingmeans for supporting a shoe on a last with its bottom facing upwardly, apower driven rotary tool, a carriage for supporting the tool foroperative engagement with the shoe bottom, a cam for moving the carriagesubstantially lengthwise of the heel-toe axis of the shoe, as well astransversely of said heel-toe axis, first variable length motiontransmitting linkage between the cam and the carriage, second variablelength motion transmitting linkage between the cam and the carriage,said first and second linkages cooperating to produce movement from thecam to the carriage whereby the tool operates in a continuous peripheralmotion on the margin of the shoe bottom in a path conforming to theoutline of the shoe, and means for varying the length of each linkagemechanism to vary the amount of movement of the carriage and, thus, thetool supported thereon in accordance with the size of shoe beingoperated on.

5. A machine for operating on the margin of a shoe bottom comprisingmeans for supporting a shoe on a last with its bottom facing upwardly, apower driven rotary tool, a carriage for supporting the tool foroperative engagement with the shoe bottom, first means for moving thecarriage substantially lengthwise of the heel-toe axis of the shoe,second means for moving the carriage transversely of the heel-toe axisof the shoe, said first and second moving means cooperating to producecontinuous peripheral movement of the tool on the margin of the shoebottom in a path conforming to the outline of the shoe, and cam operatedmeans for pivoting the tool on the carriage about an axis extendingtransversely of the heel-toe axis of the shoe whereby the angle betweenthe tool and the shoe remains uniform with respect to the variablecontour of the shoe bottom in the heel-toe direction.

6. A machine for operating on the margin of a shoe bottom comprisingmeans for supporting a shoe on a last with its bottom facing upwardly, apower driven rotary tool, a carriage for supporting the tool foroperative engagement with the shoe bottom, first means for moving thecarriage substantially lengthwise of the heel-toe axis of the shoe,second means for moving the carriage transversely of the heel-toe axisof the shoe, said first and second moving means cooperating to producecontinuous peripheral movement of the tool on the margin of the shoebottom in a path conforming to the outline of the shoe, and cam operatedmeans for pivoting the shoe support about an axis substantially parallelwith the heel-toe axis of the shoe whereby the angle between the tooland the shoe remains uniform with respect to the variable contour of theshoe bottom across its width.

7. A machine for operating on the margin of a shoe bottom comprisingmeans for supporting a shoe on a last with its bottom facing upwardly, apower driven rotary tool, a carriage for supporting the tool foroperative engagement with the shoe bottom, first means for moving thecarriage substantially lengthwise of the heeltoe axis of the shoe,second means for moving the carriage transversely of said heel-toe axis,said first and second moving means cooperating to produce continuousperipheral movement of the tool on the margin of the shoe bottom in apath conforming to the outline of the shoe, cam operated means forpivoting the shoe support about an axis substantially parallel with saidheel-toe axis, and cam operated means for pivoting the tool onthecarriage about an axis extending transversely of said heel-toe axiswhereby the angle between the tool and the shoe remains uniform withrespect to the variable contour of the shoe bottom.

8. A machine for operating on the margin of a shoe bottom comprisingmeans for supporting a shoe on a last with its bottom facing upwardly, apower driven rotary tool, a carriage for supporting the tool foroperative engagement with the shoe bottom, first means for moving thecarriage substantially lengthwise of the heel-toe axis of the shoe,second means for moving the carriage transversely of said heel-toe axis,said first and second moving means cooperating to produce movement ofthe carriage whereby the tool operates in a continuous peripheral motionon the margin of the shoe bottom in a path conforming to the outline ofthe shoe, means for operating said first and second moving means fromthe same input power shaft, and means for varying the speed of the inputpower shaft in accordance with the location of the tool with respect tothe shoe perimeter whereby the tool operates progressively about themargin of the shoe bottom at a variable speed.

9. A machine for operating on the margin of a shoe bottom comprisingmeans for supporting a shoe on a last with its bottom facing upwardly, apower driven rotary tool, a carriage for supporting the tool foroperative en gagement with the shoe bottom, first means for moving thecarriage substantially lengthwise'of the heel-toe axis of the shoe,second means for moving the carriage transversely of said heel-toe axis,said first and second moving means cooperating to produce continuousperipheral movement of the tool on the margin of the shoe bottom in apath conforming to the outline of the shoe, third means for pivoting thetool on the carriage about an axis extending transversely of saidheel-toe axis, fourth means for pivoting the shoe support about an axissubstantially parallel with said heel-toe axis, means for operating eachof the said four means from the same input power shaft, and means forvarying the speed of the power input shaft in accordance with thelocation of the tool with respect to the shoe perimeter whereby the tooloperates progressively about the margin of the shoe bottom at a variablespeed and the angle between the tool and the shoe remains uniform withrespect to the variable contour of the shoe bottom.

10. A machine for operating on the margin of a shoe bottom comprisingmeans for supporting a shoe on a last with its bottom facing upwardly, apower driven rotary tool, acarriage supporting the tool for operativeengagement with the shoe bottom, first means for moving the carriagesubstantially lengthwise of the heel-toe axis of the shoe, second meansfor moving the carriage transversely of the heel-toe axis of the shoe,said first and second moving means cooperating to produce continuousperipheral movement of the tool on the margin of the shoe bottom in apath conforming to the outline of the shoe, and yieldable means forelevating the shoe support and .maintaining the shoe yieldingly inengagement with the tool during the operation on its bottom.

11. A machine for operating on the margin of a shoe bottom com risingmeans for supporting a shoe on a last with its bottom facing upwardly, apower driven rotary tool, a carriage supporting the tool for operativeengagement with the shoe bottom, first means for moving the carriagesubstantially lengthwise of the heel-toe axis of the shoe, second meansfor moving the carriage transversely of the heel-toe axis of the shoe,said first and second moving means cooperating to produce continuousperipheral movement of the tool on the margin of the shoe bottom in apath conforming to the outline of the shoe, yieldable means forelevating the shoe support and maintaining the shoe yieldingly inengagement with the I tool, and cam controlled means cooperating withsaid the shoe into operative engagement with the tool, and means forpivoting the shoe support about said axis as the tool operates on theshoe bottom.

13. A machine for operating on a shoe bottom com prising a power drivenrotatable tool, a movable shoe support for presenting the shoe to thetool with its bottom facing upwardly, said shoe support having means forclamping the shoe for pivotal movement about an axis substantiallyparallel with the heel-toe axis of the shoe, yieldable means forelevating the shoe support to raise the shoe into operative engagementwith the tool, and cam controlled means cooperating with said yieldablemeans for varying the elevation of the work support as the the tooloperates on the shoe to conform with heightwise variations in the shoebottom;

14. A machine for operating around the margin of a shoe bottomcomprising a power driven rotatable tool, means for moving the tool in apredetermined path about the shoe bottom, a movable shoe support forpresenting the shoe to the tool with its bottom facing upwardly,yieldable means for elevating the shoe support to raise the shoe intooperative engagement with the tool, and means for pivoting the toolabout an axis extending transversely of the heel-toe axis of the shoewhereby the angle between the tool and the shoe remains uniform withrespect to the variable contour of the shoe bottom in the heel-toedirection.

15. A machine for operating around the margin of a shoe bottomcomprising a power driven rotary tool, means for moving the tool in apredetermined path about the shoe bottom, a movable shoe support forpresenting the shoe to the tool with its bottom facing upwardly, saidshoe support having means for clamping the shoe for pivotal movementabout an axis substantially parallel. with the heel-toe axis of theshoe, means for pivoting the shoe about said axis as the tool operateson the shoe bottom,

and means for'pivoting the tool about an axis normal to the saidfirst-mentioned axis whereby only one side of the roughing tool engagesthe shoe bottom at a given time and the angle between the tool and theshoe remains uniform with respect to the variable'contour of the shoebottom. Y

16. A machine for operating around the margin of a shoe bottomcomprising a power driven rotatable tool, a movable shoe support forpresenting the shoe to the tool with its bottom facing upwardly, saidshoe support having means for clamping the shoe for pivotal movementabout an axis substantially parallel-with the heel-toe axis of the shoe,yieldable means for elevating the shoe support to raise the shoe intooperative'engagement with the tool, cam operated means for pivoting theshoe about said axis as the tool operates on the shoe bottom, and meansfor moving the tool in a continuous peripheral motion about the shoebottom in a path conforming to the outline of the shoe.

17. A machine for operating around the margin of a shoe bottomcomprising a power driven rotatable tool having individual operatingelements, means for rotating said tool in a predetermined direction, amovable shoe support for presenting the shoe to the tool with its bottomfacing upwardly, said'shoe support having means for clamping the shoefor pivotal movement about an axis substantially parallel with theheel-toe axis of the shoe, yieldable means for elevating the shoesupport to raise the shoe into operative engagement with the operatingelements of the tool, means for pivotingthe shoe about said axis as thetool operates on the shoe bottom, means for moving the tool in acontinuous peripheral mo tion about the shoe bottom in a path conformingto the outline of the shoe, and means for pivoting the tool about anaxis substantially normal to the heel-toe axis of the shoe whereby thetool operates progressively about the entire marginal portion of theshoe bottom and the individual operating element of the tool move fromthe l feather line of the shoe bottom inwardly over the interior area ofthe bottom. I

18. A machine for operating on shoe bottoms compris= ing a power drivenrotatable tool, a movable shoe support for presenting the shoe to thetool with its bottom facing upwardly, said shoe support having means forclamping the shoe for pivotal movement about an axis substantiallyparallel with the heel-toe axis of the shoe, yieldable means forelevating the shoe support to move the shoe into operative engagementwith the tool, and means on the tool responsive to variable pressure forvarying the force with which the tool engages the work.

1 9. A Work support for an inverted, partially fabricatedshoeon a lastfor presentation to a machine for operating on its bottom comprising atoe rest, at least one adjustable work mask shaped toand enga-geablewith the feather line of the shoe in the area intermediate the toe andheel, and a pivotal heel support engageable with the crown of the lastfor urging the shoe against the toe rest and the Work mask.

20. A work support for an inverted, partially fabricated shoe on a lastfor presentation to a machine for operating on its bottom comprising atoe rest, at least one adjustable work'mask shaped to and engageablewith the featherline ofthe shoe in the area intermediate the toe andheel, and aheel supportcomprising a pivotal member engageable with thecrown of the last and screw adjusting means for pivoting said support toraise the heel end of the shoe as the toe is supported on the toe restwhereby the shoe is urged into engagement with the work mask.

21. A work support for an: inverted,.partially fabricated shoe on a lastfor presentation to a machine for operating; on its bottom comprising atoe rest, a heel support, at least one adjustable work mask shaped toand en gageable with the feather line of the shoe in the areaintermediate the toe and heel, and a; bar mounting the toe rest, thework mask and the heel support, each for adjustment lengthwise-of theheel-toe axis of the shoe in accordance with the size of shoe beingoperated upon.

22. A work support for. an inverted, partially fabricated shoe on a lastfor presentation to a machine for operating on its bottom comprising athe rest, a heel support, at least: oneadjustable work mask shaped toand engageable with. the feather line oh the shoe in the areaintermediate the toe. and heel, and a bar mounting the toe rest, thework mask and the heel support each for adjustment lengthwise of theheel-toe axis of the shoe in accordancewith the size of shoe beingoperated upon, and means for rocking. the work support about an axisparallel with. said; bar and said heel-toe axis.

23. tool for roughing. the bottoms of partially fabri'cated shoeshaving, in combination, a housing rotatable about a central. axis,flexible Work engaging members in the housing arranged in asubstantially circular configuration around the. central axis and meanswithin the housing to vary. the angle of inclination of the flexibleroughing members relatively to the direction, of rotation of thehousing. thereby, to vary the degree of roughing actiononrthe shoebottom.

24. A, tool for roughing the bottoms of partially fabricated' shoeshaving, in combination, a housing rotatable about a central axis,roughing. members projecting from the housing comprising flexible wirebrushes arranged in a. substantially circular configuration around thecentral axis, a. pair of plates within the housing, each plate having.slots through which the wire brushes pass, and means for rotating theplates relatively to each other to vary the angle of inclination of theflexible wire brushes 15 relatively to the direction of rotation of thehousing thereby to vary the degree of roughing action on the shoebottom.

25. A tool for roughing the bottoms of partially fabricated shoeshaving, in combination, a housing rotatable about a central axis,roughing members projecting from the housing comprising flexible wirebrushes arranged in a substantially circular configuration around thecentral axis, a pair of concentric cup-shaped members will in thehousing, each member having flanges extending ransversely of the centralaxis, the flange of each plate having slots through which the flexibleWire brushes pass, eccentric cam means for rotating the cup-shapedmembers relatively to each other to change the, alignment of said slots,thereby to vary the angle of inclination of the flexible wire brushesrelatively to the direction of rotation of the housing whereby thedegree of roughing action on the shoe bottom is varied.

26. A tool for roughing the bottoms of partially fabricated shoes,having, in combination, a housing rotatable about a central axis, workengaging roughing members in the housing arranged in a substantiallycircular configuration around the central axis and projecting downwardlyfrom the housing, means for slidably supporting the housing for axialmovement during rotation, and means for admitting pressurized fluid tothe housing to raise the housing and thereby reduce the effectivepressure of the roughing members against the shoe bottom.

27. A tool for roughing the bottoms of partially fabricated shoeshaving, in combination, a housing rotatable about a central axis,workengaging roughing members in the housing arranged in a substantiallycircular configuration around the central axis and projecting down-Wardiy from the housing, a driven spindle for rotating the housing, asleeve bearing between the spindle and the housing for supporting thehousing for rotation and for axial movement during rotation relativelyto the spindle, and means for admitting pressurized fluid to the housingduring rotation to raise the housing and thereby reduce the effectivepressure of the roughing members against the shoe.

28, A tool for roughing the bottoms of partially fabricated shoeshaving, in combination, a housing rotatable about a central axis, workengaging roughing members in the housing arranged in a substantiallycircular configuration around the central, axis and projectingdownwardly from the housing, a driven spindle at the central axis of thehousing, means operatively connecting the lower end of the spindle tothe housing for imparting rotation thereto, said connecting meanspermitting movement of the housing axially of the spindle, a sleevehearing between the spindle and the housing for supporting the housingfor rotation and for axial movement relatively to the spindle duringrotation, a passageway in the sleeve bearing extending substantiallylengthwise of the spindle and communicating with an interior portion ofthe housing, and means for admitting pressurized fluid through thepassageway and into the housing to raise the housing and thereby. reducethe effective pressure of the roughing members against the shoe bottom.

Reterences Cited in the file of this patent UNITED STATES PATENTS1,919,740 Morrill July 25, 1933 2,256,546 Brostrom Sept. 23, 19412,734,428 Onsrud Feb. 14, 1956 3,077,098 Pearsall et al Feb. 12, 1963

1. A MACHINE FOR OPERATING ON THE MARGIN OF A SHOE BOTTOM COMPRISINGMEANS FOR SUPPORTING A SHOE ON A LAST WITH ITS BOTTOM FACING UPWARDLY, APOWER DRIVEN ROTARY TOOL, A CARRIAGE SUPPORTING THE TOOL FOR OPERATIVEENGAGEMENT WITH THE SHOE BOTTOM, FIRST MEANS FOR MOVING THE CARRIAGESUBSTANTIALLY LENGTHWISE OF THE HEEL-TOE AXIS OF THE SHOE, SECOND MEANSFOR MOVING THE CARRIAGE TRANSVERSELY OF THE HEEL-TOE AXIS OF THE SHOE,SAID FIRST AND SECOND MOVING MEANS COOPERATING TO PRODUCE CONTINUOUSPERIPHERAL MOVEMENT OF THE TOOL ON THE MARGIN OF THE SHOE BOTTOM IN APATH CONFORMING TO THE OUTLINE OF THE SHOE.